Altithermaladj.n.

Brit.

/ˈaltɪˌθəːml/, U.S.

/ˈæltɪˌθərm(ə)l/

Origin: Formed within English, by compounding. Etymons: alti- comb. form, thermal adj.

Etymology: < alti- comb. form + thermal adj. Compare Anathermal adj. and Medithermal adj.

Ecology and Archaeology.

Designating a period of the Holocene, between about 7500 and 5500 years ago, when the western United States was relatively warm; of or relating to this period. Also as n.: this period. Cf. Anathermal adj., Medithermal adj.

ΚΠ

1948 E. Antevs in Bull. Univ. Utah. 35 176 (table) Altithermal... Distinctly warmer than at present.

1948 E. Antevs in Bull. Univ. Utah. 35 178 The Altithermal age was clearly dry besides warm in the Great Basin.

1957 Science 1 Feb. 185/3 Antevs' dating..of the ‘altithermal’ (5000–2500 B.C.) is based on the belief that warm dry conditions ended in the South-west when the ‘Little Ice Age’ (his ‘medithermal’) began.

1989 New Yorker 20 Feb. 85 The Great Plains went through a period of heat and drought..sometimes called the Altithermal.

2008 W. C. Foster Hist. Native Peoples Texas 4 The agricultural revolution expanded during the rapidly warming Altithermal period between ca. 5000 and 2000 bc.

This is a new entry (OED Third Edition, September 2012; most recently modified version published online December 2021).

单词	altithermal
释义	Altithermaladj.n. Brit. /ˈaltɪˌθəːml/, U.S. /ˈæltɪˌθərm(ə)l/ Origin: Formed within English, by compounding. Etymons: alti- comb. form, thermal adj. Etymology: < alti- comb. form + thermal adj. Compare Anathermal adj. and Medithermal adj. Ecology and Archaeology. Designating a period of the Holocene, between about 7500 and 5500 years ago, when the western United States was relatively warm; of or relating to this period. Also as n.: this period. Cf. Anathermal adj., Medithermal adj. ΚΠ 1948 E. Antevs in Bull. Univ. Utah. 35 176 (table) Altithermal... Distinctly warmer than at present. 1948 E. Antevs in Bull. Univ. Utah. 35 178 The Altithermal age was clearly dry besides warm in the Great Basin. 1957 Science 1 Feb. 185/3 Antevs' dating..of the ‘altithermal’ (5000–2500 B.C.) is based on the belief that warm dry conditions ended in the South-west when the ‘Little Ice Age’ (his ‘medithermal’) began. 1989 New Yorker 20 Feb. 85 The Great Plains went through a period of heat and drought..sometimes called the Altithermal. 2008 W. C. Foster Hist. Native Peoples Texas 4 The agricultural revolution expanded during the rapidly warming Altithermal period between ca. 5000 and 2000 bc. This is a new entry (OED Third Edition, September 2012; most recently modified version published online December 2021). < adj.n.1948
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